Halbert b



odel.)

HALVORSEN,

NGINE GOVERNOR.

o. 593,802. Patented Nbvn 16, 1897.

MEEIQV 1 Ill!!! urllflr V WEEECHE W w we NITED STATES I,

PATENT Erica.

I-IALBERT B. I ALvoRsnN, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TOWILLIAM K. MILLHOLLAND, or SAME PLACE.

ENGINE-GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 593,802, dated November16, 1897.

, Application filed June 25, 1896.

To all whom it may concern:

Be it known that I, HALBERT B. HALVOR- SEN, of Ohicago,in the county ofCook and- State of Illinois, have invented certain new and usefulImprovements in Engine-Governors; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, and to the letters of referencemarked thereon, which form a part of this specification.

This invention relates toimprovements in steam-engine governors of thatclass known as fly-wheel governors, or those embracingcentrifugally-acting weights, which are movably mounted with respect tothe shaft and are connected with the eccentric of the en gine in suchmanner as to shift the same laterally on the shaft, together withsprings which operate to draw the governor-weight inward in oppositionto the centrifugal force by which the same is thrown outward.

The invention consists in the features of construction hereinafter setforth, and pointed out in the appended claims.

In the accompanying drawings, which illustrate my invention, Figure 1 isa view in side elevation of a governor embodying my invention. Fig. 2 isa sectional view'thereof, taken on line 2 2 of Fig. 1. Fig. 3 is asectional view thereof, taken on line 3 3 of Fig. 1. I Fig. 4 is adetail section taken on line 4 4 of Fig. 1.

As shown in said drawings, A indicates the crank-shaft, and B thefly-wheel, which is secured thereto.

0 indicates the main eccentric, which is engaged with the eccentric-rodof the'engine in the usual manner, and D is an internal or secondaryeccentric which is located within and forms a support for the maineccentric C and which directlyengages the shaft A. Said eccentric D ismounted to turn on the shaft and is given a rotary motion thereon by asuitable connection with the movable governor-weights. The connectionsbetween the weights and the eccentric consist, as

shown, of rigid arms'D D on the eccentric,

and linksd, which connect the said weights I with the said arms andwhich are pivoted to the arms by pivot-pins d d and to the weights bypivot-pins d (1 passing through lugs e e on the weights in the mannerillusof said springs.

Serial No. 596,880. (No model.)

trated. Said eccentric D is shown as provided with a sleeve or hub Dwhich gives itan extended bearing on the shaft and to which the arms Dare attached at their inner ends. a rigidly-attached supporting-arm O,which extends radially outward'therefrom, and the outer end of which ispivotally connected with the wheel by means of a pivot-pin 0, hereinshown as inserted in the rim or flange of the wheel. Said arm affordslateral oscillatory movement in the main eccentric when the innersupporting-eccentric D is turned, and at the same time holds the saideccentric from turning on the inner eccentric and restrains it fromrotary motion relatively to the wheel and shaft. The rotation of saidinner eccentric D produces,'however, a compound movement of the maineccentric O in a direction both lateral and longitudinal with respect tothe arm 0, and in order to afford the necessary movement of said maineccentric in a direction longitudinally of the arm the latter isconnected with the wheel by a sliding connection, herein shown as formedby means of a slot 0 in said arm, through which slot the pin 0 passesand inwhich it slides.

- The weights E are supported by means of leaf-springs F F, to thecentral parts of which said weights are connected and which are arrangedgenerally in a direction at right The main eccentric is provided with.

angles to radial lines passing through said weights. Said springs areconnected at both ends with the wheel, so that movement of the Weightsis produced by the flexure of end portions of the springs, by whichoutward movement is permitted in the middle parts of the springs withwhich the weights are connected. Attachment of the weights to saidsprings is conveniently formed by the insertion of the springs throughholes in the weights in the manner illustrated. Each of said springs isimmovably secured at one end to the wheel and movably secured at itsopposite end thereto. This construction enables the ends of the springsto approach each other as the springs are flexed, and also enables theposition of the weights with respect to their distance from theaxis ofthe shaft to be changed by adjustment of the movable ends As hereinshown, one end of each spring is attached to the wheel by means of astud G, which is secured in the side face ofthe wheel and extendstherefrom in a direction parallel with the shaft, the end of the springbeing bent into an eye or loop e, which embraces said stud, in themanner shown. The opposite or movable end of each spring is movablyconnected with the wheel by means of a link II, engaged at one end withthe pivot-stud G of the opposite spring, and at the other end with thepivot-pin h, by which it is connected with the end of the spring, thespring being provided at this end also with an eye or loop e, throughwhich said pivot-pin passes. Each of said links II is provided with anadjusting device by which its length may be changed, such adjustingdevice conveniently having the form of a turnbuckle. As shown, theadjusting device consists of screw-threaded shaft H, the ends of whichare oppositely screw-threaded and inserted in separated end portions ofthe link. Said shaft has at its central part a flat-sided collar h, bywhich the shaft may be turned to adjust the length of the link. Thespring F, as shown, is notched at each end, so as to form a centralopening in which the ends of the links are inserted. By lengthening orshortening the said links II central parts of the springs F F, with theweights thereon, are brought nearer to or farther from the axis of theshaft and the operation of the governor thereby controlled, as foundneces sary to secure the desired results in the regulation of the engineto which it is applied.

In the operation of a governor constructed as described the weights Eare moved inwardly and outwardly, according to the amount of centrifugalforce developed by the rotation of the wheels and the resistance of thesprings to flexure, said springs obviously tending to hold the weightsat the inward limit of their movement in opposition to the centrifugalforce, which tends to throw the same outward. \Vhen the governor-weightsmove outwardly, the inner eccentric D is turned in a direction tothrowits central point laterally with respect to the supporting-arm Thepivotal connection of the links II at wheel greatly increases thecapacity of the springs to flex or bend in a way to allow the outwardmovement of the weights, it being obvious that as the weights moveoutwardly the curvature of the springs will increase and their ends willbe drawn together, such movement of the free ends of the springs beingafforded by the swinging of the links II on the stationary pivots G inan obvious manner.

The device as a whole is exceedingly simple and strong in constructionand at the same time sensitive to slight changes of speed in the engine,while the means for adjusting the springs is simple in construction andoperation and not liable to get out of order.

I claim as my invention 1. The combination with a shaft and flywheel, ofa main eccentric which has laterallymovable but non-rotative connectionwith the fly-wheel, an inner eccentric mounted to turn on the shaft andto support the main eccentric, a governor-weight pivotally connectedwith said inner eccentric in such manner as to turn the same when theweight moves inwardly or outwardly and a leaf-spring supporting theweight between its ends, said spring being attached at one end to apivotstud rigidly secured to the fiy-wheel and attached at its other endto said wheel by means of an endwise-adjustable link pivotally connectedwith the spring and with the ily-wheel.

2. The combination with a shaft and flywheel of a main eccentric whichhas laterallymovable but non-rotative connection with the fly-wheel, aninner supporting-eccentric mounted to turn on the shaft and engagingsaid main eccentric, said eccentric being provided with arigidly-attached radial arm, a centrifugally-acting weight connectedwith said arm and a leaf-spring which engages the weight between itsends, said spring having pivotal connection at one end with saidflywheel, and a link connecting the opposite end of said spring withsaid fly-wheel consisting of separate end pieces, and anoppositelyscrew-threaded intermediate part connecting the same, saidlink having a pivotal connection with the spring and fly-wheel.

In testimony that I claim the foregoing as my invention I aflix mysignature in presence of two witnesses.

IIALBERT B. IIALVORSEN.

Witnesses:

O. CLARENCE POOLE, V. L. HALL.

